Condenser and process of making the same



June 3, 1930; A. TAUB 1,761,281

CONDENSER AND PROCESS OF MAKING THE SAME Filed May 3. 1926 fi INVENTOR.

lzw M w 6 A TTORNEY.

Patented June 3, 1930 ALEX IA'UB, OF DETROIT, MICHIGAN oonnnnsnn mrnocnss or MAKING THE same Application filed May 3, 1926. Serial No. 106,315.

The present invention relates to condensers and processes of making the same.

Among the objects of the invention is to facilitate and cheape'n the manufacture of double wall tubing which is recognized as being highly efiicient for condensers, water being led through the inner tube and the fluid to be condensed or cooled being led through the outer tube between the two walls.

Another object'is to provide atube of the kind indicated which will'more accurately retain its spacing between the walls when bent or curved to suitable shape.

Still another object is a cheap and eflicient process of making such tubing and condensers.

Other objects will readily appear to those skilled in the art upon reference to the following description and drawings in which:

Fig. l is a conventional representation of a condenser of the type indicated.

Fig. 2 is a cross section of the present form of tube.

Figs. 3, 4, and a are sectional views indicating several steps in the formation of the 'tu e.

As indicated in the drawings, the tubing is to be made from flat stock, a strip for ex- 0 ample, of copper, of suitable width being passed through a series of rolls adapted to form the tube in several stages.

The rolls are preferably so shaped and arranged that the first stage forms the strip 5 10 into the form indicated in Fig. 3, that is, with a suitable channel 11 along one edge. The next rolls will then form the channeled portion into a tube like part 11 with the flat portion 10 bent back on itself as at 12. This stage is indicated in Fig. 4.

The third stage forms the portion 10 to the form shown at 10 in Fig. 5,that is, as the outer tube. v I

The tubing from the third stage is then passed throu h a welding or soldering step to join both 'ee edges 13 and 14 to the double edge 12 as shown in Fig. 2 at 15,where-' After the coil is so formed the ends of the outer tube are preferably trimmed off and closed around the extending inner tube and side connections made with the outer tube as indicated at 21.

As in similar condensers, water is passed through the inner tube 11 and the fluid to be cooled or condensed passed through the connect-ions 21 and the outer tube.

The tubing formed in the above outlined process consists of an inner tube having a surrounding outer. tube tangent thereto with the tubes line of contact secured together along the by means of the weld. It

should be noted that the term welding is to be understood to include also brazing and soldering.

-In winding the tubing upon the form to produce the condenser coil it is preferred to lead it upon the form in such position that the seam 15 lies substantially in the plane of the curve.

This arrangement prevents displacement of the inner coil and thereby maintains proper spacing between the inner and outer walls,a feature which is difiicult if not impossible when coiling two distinct tubes.

Having now described the invention and the preferred forms of embodiment thereof, it is to be understood that the said invention is not to be limited to the specific details herein described and illustrated .but only by the scope of the claims which follow.

I claim said tubing being made of flexible metal whereby said tubing may be bent to a suit able form.

upon the tubing so formed is wound around a suitable form to produce the condenser coil 20 such as indicated in Fig. 1.

ALEX TAUB. 

